Mounting for flexible plates for flat-bed presses



Dec. 26, 1922. 1,439,808. S. C. FORRESTER.

MOUNTING FOR FLEXIBLE PLATES FOR FLAT BED PRESSES.

man sEPT.12,1s21.

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Patented Dies. 26, i922.

ananas SAMUEL cLiirronn ronnns'rna-or ATLiinTn,eiioniJ-in, 'assit-inea To FULTON Bae .anp coTToiv `iviiLLs, or ATLANTA, esonera. w

BIOUNTING FOR FLEXIBLE PLATES FOR FLAT-BED PRESSES.

Application filed September 12, i921. Serial No. 4991,921.

To all whom it may concern:

Be it known "that I, SAMUEL residing at Atlanta, in the county of'llulton and State of Georgia, have inventedflflew and useful linproveinents iii l\/loiintings for form possessing facilitiesv for detachably securing an elastic printing element in operative position on the form, the mounting being such asto permit inteichangeabilityv of theprinting element for either {iat-bed or rotary work.

Another important `object of this .invention, is to produce a formfor the-usey of elastic printing elements which` will-enable thelatter to be expeditiously mounted and.

adjustably tensioned'in order to obtain-the same degree 0f distortionof the printing element when mounted on a tlat-bedpress as prevailed when mounted on a rotary press.

Other important objects /of this invention are v: to provide a ferm which may beprepared and made readyl for printing with a minimum' loss of time, and one which will accommodate la plurality of.. printingelements on a single mounting, and likewise enable the removal of one or more oi the printing elements without disturbing the others. v

With these which will become apparent as the description proceeds, ythe invention resides inthe construction, combination and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which like characters of reference indicate like parts throughout the several figures, of which:

F ig. l is a perspective view ofthis'iinproved mounting illustrating the series of printing elements in operative position.

Briefly stated, this improved fo'rinpincludes parallel side-sticks suitably spaced with printers' furniture? and bridged by elastic printing elements engaged along their edges by fastening meansl seated yin CLIFFORD Foiannsfriim; a citizen of the United States,

and other objects in view said side-sticks, the assembled form after the platesl have been properly tensioned, being] suitably locked ina-standard chase.

- TWhen printing 0n loosely woven fabrics such burlap, jute, and the like, and especially when the design yto be printed involves two oil more colors, it is frequently necessary to print one .color; of the design with 'a rotary press and the other rcolor or'1V ycolors with a flat-bed press. Heretofore, it

'has been the custom in multi-color printing to employr separate printing elements, the form ef plate depending on the` character of press employed. But this'arrangement has been 4v found highlyl unsatisfactory, owing `to the diiliculty experienced -in securing proper registration of the colors, as well as requiring a multiplicity of plates andopera'tions.

lt is, therefore, the aim and purpose of thisinvention to'jpr'ovide a form by means of which the elasticelement used 0n a rotary press may be transferred from the latter and y employed for flat-bed work, or vice versa,

v:ind when so transferred maybe tensioned as to gi ve characters en thepiinting element the saine degree o1; distortion whenused ,on a fiat-bed press, as existed when in use on 'a intary ]L'nfess.` Y A 4 ln the illustrated embodiment characterizing this invention there is shown a standard chase 5, interior of which, andl parallel tothe sides thereofare positioned spaced side-sticks 6 and/l. Located between these side-sticks are a plurality of blocks 8 ofr varying dimensions, known as printers furniture, forming in conjunction with the side-sticks, a rectangular block `or bed sur-g face upon which'are positioned the printing elements or plates 9. This structurev is lockedj in the desired position within the chase by means of the: usualquoins 10, positioned intermediate one 0f they side-sticks f and the side of the chase.

Side-sticks G and 7 are provided with a plurality of apertures yll to receive screws l2, the free ends of which are .adapted to.'

niets i3 formed at intervals along the edges l of the printing plate or plates 9, the dimensions of said grommets being `such as to printing element, it may be found expedient to substitute snap-fastening rmeans similar Vextend tlirouglrsuitable openings 0r grointo those used as glove clasps, so that the printing plate may be readily snapped into position. A

The structural features of this improved form having been described, its assemblage is as follows: The side-sticks being suitablyv spaced with printers furniture to the approximate width of the printing elements, the edges of the latter are then brought into engagement with the screws seated in the side-sticks, additional furniture is then added to tensionI the printing element, whereupon the form is-suitably locked in the chase. A proof'is. then-*run 0H to ascertain if the characters of the printing element have been suniciently distorted to give the desired registration,l if not, theform is removed and additionalhfurniture is interposed between the` side-'sticks to further stretch the printing` elementf'toy distort the characters sufficiently toobtain the desired registration.

Manifestly, with this arrangement it is possible to interchangeably employ an elastic element on rotaryor fiat-bed` presses accordingto the exigencies of the situation, to quickly attacher detachthefprinting element and to readily stretch the same to any desired f degree.

Althoughiin the foregoing, cert-ain elements'may have beenset forth as best adapted' to perform the functionslallotted to them, nevertheless, itis to be understood that various ininorfchanges as to form, substance, etc., may-be` resorted to wit-hinl the scope of the appended claims without departing from or sacrificing: any of the principles of this invention;`

Having thus described my invention, and without enumerating variations and equivalents, what l desireprotected by Letters Patent is as set forth in the following claims l.r A form including spaced side sticks and -an-elastic printing element interconnectingxsaid sticks. v

2A form including spaced side-sticks and'ianelastic element interconnecting said sticks, andmeanseifecting ay detachable connectionbetween-the printing element and the side-sticks.4 v

` 3. AA form including spaced side-sticks,-

sticks forming aprintingbase, andan elas-v tic printing element overlying the base and detachably connected to the side-sticks.

6. A form including spaced side-sticks, printers furniture intermediate the sidesticks forming a printing-basmand an elastic printing element overlying the base and detacliably connected at its edges to the sidesticks.

'7.' A form including spaced side -sticks, printers7 furniture intermediate the sidesticks, an elastic printingelement bridging the side-sticks and overlying said furniture, and cooperatingmeans along the edges of said iiexible element and on said side-sticks `eifecting a detachableconnection between an elastic printing element interconnecting said side-sticks and 'detachably connected at itseXt-remitiesto ythel latter, and printers' furniture interposed between the side-sticks to tension the ieXilol'e element and provide a printing base.

l2.' rThe combination with a'chasef; of a form including spaced side-sticks, printers furniture intermediate-l said sticksfforming a printing base, and an elastic printing element* overlying the base anddetachably connected to vthe side-sticks.

13. Thercombination with a chase; of a form includingspaced side-sticks, printers furniture intermediateg saidl sticks forming4 a printing base, and an elasticr printing element overlying thebase andfdetachably connected at its extremities to the sidesticks. f

14. The' combination with a chase; of a form including spaced 'side-sticks, anelastic printingelement interconnecting the sidesticks, and meansv intermediate the sidesticks yfor tensioning said printingV element.

l5. The combination with a chase;y of a. form including spaced side-sticks, an elastic printing elementn interconnecting said side-sticks anddetachably connected atits extremities to the latter',,andfmeans-interf mediate the` side-sticks for tensioning-'said printing element.

ll lhe combinationwith a chase; of a. form including spaced side-sticks, an elastic printing element interconnecting Asaid sidesticks and detachably engaged at vits extremva printing base.y 17. The combinationwith ,a chase; of ar lform including yspaced parallel `side-sticks,

kitieswith the latter, .and printers furniture interposed between the side-sticks to tension the iiexible `printing element and provide an elastic printingfelement interconnecting saidjside-sticks and detachably engaged at its extremities Wlth the latter, and printers -furniture interposed betweenl the side-sticks to tension the iiexible printing element and provide a printing base.'

18.1na mounting of the character y' described, the'combinaton with a chase, of" spaeedparallel sdefsticks arranged in the vchase adjacent opposite longitudinal sides ,of the latter, a plurality of elastic printing plates bridging thespace between the sticks '.Wth Itheir' opposite edges 'engagingv the latter, said platesA being adjustable longitudinally of the sticks, spacer elements between the said sticks, means for lockingthe saidstieks Within the chase, and means for fastening the said plates to the said sticks, said means embodying separable fastening elementsA carried', respectively, bythe said 

